ANTIOCH -- A 31-year-old woman shot and killed early Sunday outside a roller rink at the Contra Costa County Fairgrounds was identified Monday.

Oakland resident Amber Abangan, 31, was attending an Adult Late Night Skate Jam at the Paradise Skate Roller Rink when she was shot in the torso about 1:35 a.m. outside the Fairgrounds rink at 1201 W. 10th Street, authorities said. A large crowd was still present when authorities arrived outside the rink, where they found Abangan and two other men suffering from gunshot wounds.

Abangan was taken to Sutter Delta Medical Center in Antioch, where she died, Contra Costa County Sheriff's spokesman Jimmy Lee said. The other two victims, an 18-year-old man and a man in his 40s, remain at John Muir Medical Center in Walnut Creek, where they are being treated for non-life threatening injuries.

Detectives continue to search for a motive for the homicide, and no suspects have been arrested, Lee said. Witnesses told officers that a group of people were fighting outside the skate rink, and that at some point, one person pulled out a gun and someone else called 911, Lt. Darren Hobbs said.

The adults at the skate night are part of a skating club called "As The Wheel Turns" that has gathered at the Fairgrounds monthly since February, Fairgrounds CEO Robert Williamson said. He said the future of the event is up in the air.

"That's something we have to sit down and discuss with our staff. Up to this point, it's always been a safe event. And everything that happened went down outside the rink in the parking lot. But we will have to discuss where we go from here," Williamson said. "We are deeply saddened by the entire incident. We strive to create a family-friendly atmosphere and take every precaution to keep individuals safe, and my heart breaks to learn of such violence."

Staff writer Rick Hurd contributed to this report. Contact Erin Ivie at eivie@bayareanewsgroup.com. Follow her at Twitter.com/erin_ivie.